SET 4 - Smith PDF

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SET 4 what is the structural organization of the nervous system? Central Nervous System Peripheral Nervous System What is the CNS composed of? Brain and Spinal Cord make up the... What is the PNS composed of? Cranial Nerves, Spinal Nerves, and Ganglia make up the ... Functions of the Nervous System? Collecting information, Processing and evaluating information, Responding to information are the functions of the ... What are the two functional divisions of the nervous system? Sensory and Motor are the functional divisions of What is the function of the sensory nervous system? It is responsible for receiving sensor information from receptors and transmitting this information to the CNS. (It senses stimuli and relays it to the CNS) What are the two parts of the sensory nervous system? Somatic sensory and visceral sensory make up what nervous system... What are the senses for the somatic sensory portion of the sensory nervous system? Recieves sensory information from skin, fascia, joints, muscles, special senses (taste, vision hearing etc.) What is the function for the visceral nervous system? transmits nerve impulses from blood vessels and viscera to the CNS, Recieves sensory information from the viscera (feeling full when eating) What is the motor nervous system responsible for? Transmitting motor impulses from the CNS to muscles and glands is the function of the ... What are the two components of the motor nervous system? somatic motor and autonomic motor make up what nervous system... What is the function of the somatic motor nervous system? innervates skeletal muscles Conducts nerve impulses from the CNS to the skeletal muscles causing them to contract Both somatic nervous systems are voluntary or involuntary? what systems are voluntary both the visceral sensory and autonomic motor systems are voluntary or involuntary? what systems are involuntary What is the function of the autonomic motor nervous system? innervates cardiac muscles, smooth muscles, glands. (heartbeats) The motor nervous system is also known as efferent nerve impulses associates with... The sensory nervous system is also known as afferent nerve impulses associates with... short branches that are part of neuron receives input information and conduction neural impulses towards the cell body Dendrites functions are... What is considered the neuron's control center and is responsible for receiving, integrating, and sending nerve impulses?

Neuron's cell body functions are... a chromatic substance that gives the gray color of gray matter/cell bodies Nissl bodies function... part of a neuron that is a long process that transmit neural impulses to other structures Axons start of axon triangle shaped axon hillock is... term used to describe the axon side branches axon collateral... array of fine terminal extensions of axon telondendria is... slightly expanded end of axon, sites of synapse synaptic knobs are... What are the three classifications for neurons? Unipolar, bipolar, and multipolar are the... Which of the three types of neuron classification are the most common? Multipolar What are the functional classifications of neurons? Sensory, Motor, and Interneurons What is so special about the interneuron? Only found in the CNS and facilitates communication between motor and sensory neurons What glial cells are in the CNS? Astrocyte, Ependymal, Microglial, and Oligdendrocytes What glial cells are in the PNS? Schwann cells (Neurolemmocytes) and Satellite cells Forms the blood-brain barrier. What is the function of the astrocyte? Lines ventricles of the brain and central canal. froms the choroid plexus to produce CSF What is the function of the ependymal cell? Phagocytic actives such as defending against pathogens; removes debris,and phagocytizes waste What is the function of the microglial cell? Myelinates and insulates the CNS which allows for faster nerve impulses conduction through the axon What is the function of the oligodendrocyte? flattened cells around neuron cell bodies in ganglia, separates cell bodies from surrounding environment What is the function of the satellite cell? Myelinates and insulates the PNS which allows for faster nerve impulse conduction through the axon What is the function of the Schwann cell (Neurolemmocytes)? Process of myelination? myelin sheath will wrap around an axon and continue to overlap layer after layer unmyelinated axons are not associated with what type of glial cell oligodendrocytes (CNS) process of axon regeneration of Neurolemmocytes?

the proximal portion of the severed axon will be sealed and swollen while the distal portion will disintegrate. Eventually a regeneration tube forms and the axon will regenerate and myelination occurs. A cable like bundle of axons. What is a nerve? Describe the Nerve structure Group of axons wrapped into separate bundles what is a fascicle? A typical synapse in the CNS consists of what two neurons? Presynaptic neuron and postsynaptic neuron Specialized junctions between one axon and another neuron, muscle cell, or gland cell, where they terminate Synapses What are the plasma membranes of the synapses separated by? Synaptic cleft During this synapse, positively charged ions enter the post synaptic cell, primarily occurs between smooth muscle cells. electrical synapse chemical synapse steps: presynaptic neuron will release neurolemmocytes that will bind to receptors of the postsynaptic neuron. This leads to ion channels opening and nerve impulse to continue at post synaptic cell impulse conduction of local current stimulates adjacent membrane, region of action potential is positive as it travels across a negative all or nothing response Neurons that are grouped into complex patterns based on how impulses are conducted and distributed neuronal pools type of neuronal pools converging, multiple inputs to 1 output diverging, expanding reverberating, repetitive acts parallel-after-discharge, multiple process of inputs which glial cells gets destroyed for the disorder "multiple sclerosis?" (Hint: CNS) oligodendrocytes...